Water-gauge lighting fixture



RQ B. BENJAMIN Fled- Aug.. '7, 1918 WATER GAUGE LIGHTING FIXTURE Feb. 13, R923 Patented heb.. i3, 1923.

tllldllihl@ 9 .E alpin-ity .idf-hill e lhlnii`D @lidliilino REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, .[.XSSGNOR TO BENJAJNN w ELECTRIC TEANUFACTURING COMPANY, OF CHICAGO, ILLINOS, A CORPOBATIO'N OF ILLINOIS.

WATER-GAUGE LIGHTING FIXTURE.

Application filed August '7, 1918.

To all whom t may concern.'

Be it known that l, RnUnnN B. BEN- JAMIN, a. citizen of the United States, residing at Chicago, in the county of Cook and State et lllinois, have invented new and useful improvements in lNater-Gauge Lighting Fixtures, ot which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part ci this specification.

rlhis invention relates to improvements in water gauge lighting fixtures and relates particularly to a fixture designed to be used in connection with the water level gauge on a steam boiler for the purpose of lighting the water tube, means beine' provided jt'or screening the light except taat which falls directly upon this tube.

One ot the objects ot the invention is to provide a device of this type which is` eccnomical to manufacture and of simple censtruction. Another object is to provide a :tixture of this type which is so constructed that the lamp may be readily removed for cleaning or replacement.

ln the ,accompanying drawings, in which I have illustrated a fixture embodying my invention Figure 1 is an elevational side view of a steam gauge fitted with one of these fixtures;

F ig. 2 is an elevational front view of the fixture, shown partly in section, and

Fig. 3 is a top plan view of the lower part of the fixture as seen from a plane indicated by the line 3-3 on Fig 1.

In the several figures of the drawings, in which like reference numerals indicate the same parts throughout, 10 represents a boiler of a steam generating plant. Short tubes 11 and 12 connect the water glass 13 at its ends to the boiler and-establish communication between the tube and the same. The upper portion of the fixture comprises a hollow fitting 11.5, which is adapted to be clamped upon the tube 11, this fitting being formed with a. notch or slot in its upper surface for the reception ot the tube 11 and be- .ing provided with a clamping plate 16, which extends over the tube 11 and is drawn down against fitting 15 by a pair of screws 17 and 1S. This fitting 15 has a nipple or neck 19 upon its lower portion, this neck being screw threaded to receive the interiorly threaded neck 2O of a lamp receptacle or socket 21. The fitting l5 is formed with Serial No. 248,685.

a screw-threaded side opening 22 tor the reception et the threaded end ot a conduit pipe The conductors which supply current tor the lamp are led in through the conduit pipe 22 and extend down through the hollow neck 19 into the socket 21, where they are attached to the binder terminals of the latter.

The shield 2a'- which confines the light and prevents its passing from the lamp in any direction except directly toward the water glass consists of a piece et sheet metal, bent into cylindrical lorin, and lett with its vertical edges separated by a. distance, slightly greater than will be required when the article is assembled. lThis member 24C is clamped upon the receptacle 21 by means ot a ring 25, the latter consisting et' a strip of sheet metal, curved so that its ends nearly meet, these ends being turned outward and provided with openings through which iS l passed a small bolt 26 provided with a nut 2'?. W'hen the bolt is tightened the ends of the ring 25 are drawn together, so Ias to clamp the sheet metal shield 24 into firm engagement with the easing shell of the receptacle 21. rIhese shells are usually made with a bead 28 on the lower edge ot the shell. To cooperate with this bead, there is formed on the shield 24E a similar bead 29, inte which fits the bead 28 on the receptacle shell. lWhen the clamping screw is tightened and the clamping ring 25 is drawn down upon the member 24, the latter is prevented from moving up or down by the interlocking et these beads The upper edge of the shield 2d is :tlanged outward at 24a, the clamping ring 25 being confined between this fiange and the bead 29.

The lower end ot the member 2el is also .termed with a bead $30. rlhe lower end ot the fixture censists a. hemispherieal howlshaped member 31 having a bead ft2 to receive the bead BO et the shield. lllhcn the device is assembled the vertical edges el' the shield are separated by a space .ius :i {iicient to permit the lamp to properly illuminate the water tube ot the gauge.' The tendenoi7 ciZ the shield te open holds the cap in pesition as leng as the bead on the shield is cngaged in the bead on the cap. To remove the lamp the shield 24 is compressed to bring the vertical edges 33 and 34 closer together and permit the cap to be drawn off over the bead.

It will be seen that this device is. of ei;- tremely simple construction and economical to manufacture and does not require complicated tools, dies or the like.

Having thus described my invention, what I claim as new and desire to secure'by Letters Patent is:

l. In a device of the class described, the combination of a fitting arranged to be se cured to a water level gauge and having a threaded neck for the reception of a lamp holding device, a shield comprising a strip of' sheet metal rolled into cylindrical form and having its edges separated to permit the passage oit light to the tube of the gauge, a removable cap for one end oi said sheet metal member, and means or clamping said shield to the lamp holding device.

2. A device of the class described, comprising a fitting arranged to be clamped to a water gauge, said fitting having an inlet ior feed wires and arranged to support a lamp holding receptacle, a light-confining shield comprising a strip of sheet metal rolled into cylindrical form and having its edges separated, means i'or clamping the upper edge of said shield to the lamp holding receptacle, and a cap for the opposite end ot said shield, said cap being arranged to be held in position by the tendency of the sheet metal shield to open.

3. A- lighting iixture for water gauges comprising a strip of sheet metal YFormed into-a tube. and having its edges separated forming a longitudinal opening, means ttor securing said member at one oi its ends to a lamp holding receptacle, whereby said end is closed by said receptacle, and means for closing the opposite end of said membeny said means embracing said end and being held in position by the tendency of the sheet metal strip to open.

el. A lighting fixture for water gauges, comprising a lamp holding device, means for supporting the lamp holding device, a lightcontining shield comprising a strip of sheet material bent into cylindrical form and hav ing its edges separated to permitthe pas sage or' light therebetween, one end of said member having a bead formed thereon, a cap arranged to snap upon said member and having a bead `for co-operation with the bead o'r` the latter, said cap being held in position by the tendency oi the cylindrical member to expand in the cap, and means for clamping the opposite end of said cylindrical member to the lamp holding device.

5. The combination with a water gauge and a boiler to which the same is applied, ot a iitting interposed between said gauge and boiler for illuminating said gauge, said fitting comprising a lamp and a receptacle for the same, a tubular shield rolled from a sheet whereby it may be fitted around said lamp and clamped into place around said receptacle to leave a light slit that is parallel to said gauge to illuminate the latter, means for securing said tubular member at one end lto the outside of said receptacle, a cap inember to rit over the other end of said tubular member and be held in place thereover by the tendency of the metal tube to open.

In witness whereof, I have hereunto subscribed my name.

REUBEN B. BENJAMIN. 

